Background and purpose: Diabetes mellitus is one of the most prevalent chronic non-communicable diseases in the world and it is frequently reported in patients with COVID-19. It is not clear if people with diabetes mellitus have a higher risk of infection or if once infected, they have a worse prognosis. Our purpose was to review and analyze the available information on COVID-19 and diabetes mellitus and try to better understand the risk to which people with diabetes mellitus are exposed during the COVID-19 pandemic.
Methods: PubMed, Cochrane Database of Systematic Reviews, Google Scholar, Scopus, and Epistemonikos were reviewed for national epidemiological records and systematic reviews using the terms “Diabetes Mellitus”, “COVID-19”, “Risk Factors”, “Prognosis”, “Critical Care”, “Respiratory Insufficiency” and “Death”. Systematic reviews of comorbidities in patients with COVID-19, those that analyzed the course of the disease and prognostic factors in patients with COVID-19, and those that included prognostic models were selected for review.
Results: The available information suggests that diabetes mellitus is a frequent comorbidity in people with COVID-19, but it is difficult to differentiate whether this is due to the high prevalence of diabetes mellitus or a higher risk of infection. People with diabetes mellitus appear to be at a greater risk of severe COVID-19 or dying from COVID-19.
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